CDMA设备的dbm信号强度范围

Question

我正在检查CDMA设备的信号强度.任何人都可以指定范围signalStrength.getCdmaDbm()返回吗？最低的是-120但是对于完整信号强度有什么价值？我得到的最高是-52.

Answer 1

好吧,我不确定这是不是你要找的东西但是在看了android源代码中的SignalStrength.java文件后,我注意到了一些代码,它有一堆cdma dbm和ecio级别的代码.

DBM 
level 4 >= -75
level 3 >= -85
level 2 >= -95
level 1 >= -100

Ecio 
level 4 >= -90
level 3 >= -110
level 2 >= -130
level 1 >= -150

和水平是两者中最低的

actualLevel = (levelDbm < levelEcio) ? levelDbm : levelEcio;

但我注意到这与通知中显示的实际条形无关.如果在3G中,则忽略该电平并使用信噪比.

signalStrength.getEvdoSnr() // value is 0 to 8 so divide by two to get the bars

如果数据从3G降至1x,则使用actualLevel.

这是我的代码,找到显示条数.

   public void onSignalStrengthsChanged(SignalStrength signalStrength) {
        super.onSignalStrengthsChanged(signalStrength);
        if (signalStrength.isGsm()) {
            if (signalStrength.getGsmSignalStrength() != 99)
                signalStrengthValue = signalStrength.getGsmSignalStrength() * 2 - 113;
            else
                signalStrengthValue = signalStrength.getGsmSignalStrength();
        } else {
            final int snr = signalStrength.getEvdoSnr();
            final int cdmaDbm = signalStrength.getCdmaDbm();
            final int cdmaEcio = signalStrength.getCdmaEcio();
            int levelDbm;
            int levelEcio;
            int level = 0;

            if (snr == -1) {
                if (cdmaDbm >= -75) levelDbm = 4;
                else if (cdmaDbm >= -85) levelDbm = 3;
                else if (cdmaDbm >= -95) levelDbm = 2;
                else if (cdmaDbm >= -100) levelDbm = 1;
                else levelDbm = 0;

                // Ec/Io are in dB*10
                if (cdmaEcio >= -90) levelEcio = 4;
                else if (cdmaEcio >= -110) levelEcio = 3;
                else if (cdmaEcio >= -130) levelEcio = 2;
                else if (cdmaEcio >= -150) levelEcio = 1;
                else levelEcio = 0;

                level = (levelDbm < levelEcio) ? levelDbm : levelEcio;
            } else {
                if (snr == 7 || snr == 8) level =4;
                else if (snr == 5 || snr == 6 ) level =3;
                else if (snr == 3 || snr == 4) level = 2;
                else if (snr ==1 || snr ==2) level =1;

            }

            text.setText("Bars= " + level);


        }
    }

在on create方法中使用下面这个,并确保manifest使用READ_PHONE_STATE.

    TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
    AndroidPhoneStateListener phoneStateListener = new AndroidPhoneStateListener(text);
    telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS);